Figure 1.

Association of pre-ban service as a flight attendant with nasal congestion, throat or eye irritation. Amongst flight attendants without a personal smoking history, odds ratios of reporting daily, weekly or monthly, or less than monthly symptoms of nasal congestion, throat or eye irritation (ENT symptoms) vs. never experiencing symptoms are shown per a 10-year increase in pre-smoking ban service (---) and post-smoking ban service (^___), with point estimates represented by a solid box (■) and 95% confidence intervals represented by the region bounded by patterned lines (├─┤).